How to Glue Tongue and Groove Boards over Concrete How to Glue Tongue and Groove Boards over Concrete

Installing tongue and groove boards involves a process that is not that difficult. However, it will take the proper knowledge and a lot of hard work. If you plan on gluing tongue and groove boards down to a concrete floor, here are the basic steps you'll want to take.

Needed for the Job

  • Tongue and groove wood
  • Saw
  • Adhesive
  • Notched trowel
  • Concrete blocks
  • Transition pieces
  • Wood glue
  • Tapping block
  • Rubber mallet
  • Tape measure
  • Self-leveling compound

Step 1—Prepare the Area

Start out by removing everything from the room in which you plan on installing. If there is any existing flooring, you will need to take it up. Sometimes, the concrete will not be perfectly level. When this happens, you will need to use self-leveling compound to even it out.

Step 2—Applying the Adhesive

To glue the wood flooring down to the concrete, you will need a special wood flooring adhesive. This type of adhesive is very thick and must be applied with a trowel. Scoop some of the adhesive out onto the floor with your trowel. Use a notched trowel to spread the adhesive evenly over the floor. You want to make sure not to get too much adhesive out onto the floor at one time. In most cases, you will want to work in 3 foot wide sections with the adhesive. This will ensure that you do not allow the adhesive to dry out or step in it. 

Step 3—Install the First Row

Place one of the boards into the corner of the room. Make sure to press it firmly down into the adhesive. At that point, you should put another board onto the narrow joint of the board on the floor. You want to install boards in a vertical row across the room. When you join the two boards together, insert some wood glue into the groove of one of the boards. Press the two boards together and down on the floor at the same time. Continue installing boards vertically until you get to a wall.

Step 4—Cutting the Board

You will need to cut a board to fit into the opening between the last board and the wall. Take your tape measure and get the dimension of the gap. Measure the distance on the back of a board and mark it with a pencil. Set the board on your saw and then make the cut in the appropriate place.

Step 5—Continuing the Installation

Once you have a piece that is the right size, you can put it in the gap and move on to the next row. Take the small piece that is left over from the cut and use it to start the next row. When you start the next row, be sure to insert some glue into the joint between the boards. Continue laying boards vertically one row at a time.

Step 6—Concrete Blocks

Set some concrete blocks on the wood so that they can help press the boards into the adhesive while it dries.

Step 7—Install Transitions

You will need to install transition pieces in the doorways of the room. Transitions will cover up the edges of the wood and give you a finished look. You should be able to attach these with some liquid nails.

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